When eTap was launched, there was lots of speculation that the protocol they used to transmit from the shifters to the derailleurs would be hacked. Now, over three years later, no-one has yet achieved this as far as I'm aware.
The incentive to hack something to get something for free is MUUUUUUUCH higher than hacking something to, what, change gears on someone else's bike for the LOLs?
When eTap was launched, there was lots of speculation that the protocol they used to transmit from the shifters to the derailleurs would be hacked. Now, over three years later, no-one has yet achieved this as far as I'm aware.